JP3253396B2 - Steering performance test vehicle and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering performance test vehicle and a method of manufacturing the same, and more particularly to a vehicle capable of easily adjusting the balance between weight and center of gravity and increasing the degree of freedom of tuning control of a suspension device and the like.

2. Description of the Related Art It is difficult to extract the influence of vehicle basic specifications such as weight distribution in a driving test of an actual vehicle for driving performance. There are various limitations to doing.

Generally, there is a difference in vehicle basic specifications between a test vehicle and a finally developed vehicle, so that there is a limit in performance development and a limit in analysis by computer simulation. 2. Description of the Related Art Conventionally, in a steering performance test vehicle, a vehicle capable of selectively mounting a plurality of types of suspension devices or capable of changing a weight balance and a moment of inertia by a balance weight has been put to practical use. In general, a conventional steering performance test vehicle has a power unit disposed on a body having an integral monocoque structure in the same manner as a normal vehicle (F).
F-type, FR-type, MR-type, and RR-type configurations are employed.

[0003]

In the conventional steering performance test vehicle, the variable width of the body rigidity cannot be increased because the vehicle has an integrated structure, and the power unit is usually arranged at the front and rear of the vehicle body. Therefore, there are problems such as an increase in the weight of the balance weight necessary for adjusting the balance between the weight and the center of gravity, and a decrease in the adjustment range of the moment of inertia. In addition, the conventional steering performance test vehicle has a problem in that the degree of freedom of tuning control for changing the basic specifications of the vehicle is low, and a great deal of labor and time are required. SUMMARY OF THE INVENTION An object of the present invention is to provide a steering performance test vehicle in which the balance between the weight, the center of gravity, and the moment of inertia can be easily adjusted and the degree of freedom in tuning control is high, and a method of manufacturing the same.

[0004]

According to a first aspect of the present invention, there is provided a steering performance test vehicle for testing a steering stability, comprising: a front portion of a vehicle body provided with a front suspension;
A vehicle body in which a central portion of a vehicle body on which an occupant rides and a rear portion of a vehicle body on which a rear suspension is provided are provided so that they can be disassembled, and a power unit is arranged in the central portion of the vehicle body on the side opposite to a driver's seat. It is.

Here, at least the vehicle body front portion and the vehicle body rear portion are each configured to have a skeleton monocoque structure comprising a frame structure and a skin panel detachably connected to the frame structure. A structure in which a center portion of the vehicle body has a monocoque structure composed of a panel in which an aluminum honeycomb material is sandwiched between two reinforced fiber reinforced synthetic resin panels (Claim 3), and the power units are arranged vertically in a vehicle front-rear direction. (Claim 4), a configuration in which a fuel tank is arranged on a side opposite to a power unit in a rear portion of the vehicle body center portion (claim 5), a plurality of types of suspension mechanisms that can be attached to the front portion of the vehicle body. A front cross member with a mounting part is provided, and a plurality of mounting parts capable of mounting multiple types of suspension mechanisms Structure in which a rear cross member was e (claim 6), wherein the front cross member, and a predetermined first orientation, 180 degrees turning in a horizontal plane from the first position

[0006] A configuration (alternative to claim 6) that can be selectively attached to the second posture, and a balance weight installation portion for attaching a plurality of balance weights to the front portion of the vehicle body. A configuration in which a plurality of balance weights are provided at a rear portion of the front vehicle body (claim 9), a front booster for a brake device and a master cylinder, An independent rear wheel booster and a master cylinder are provided.
A structure in which a pair of boosters and a master cylinder are arranged in the center of the vehicle body (Claim 10), a front wheel booster and a rear wheel booster are connected by a balance lever, and a rear wheel brake pressure supply system. A cut valve that can be switched in a plurality of stages, and the cut valve is disposed in the center of the vehicle body (claim 11 dependent on claim 10). At least a part of the front wheel brake hose of the brake device is a front cross member. And at least a part of the rear wheel brake hose is provided on the rear cross member.
, And various aspects such as claim 12).

According to a thirteenth aspect of the present invention, there is provided a method for manufacturing a steering performance test vehicle, comprising:
The vehicle body is constructed by dividing and manufacturing a vehicle body center portion on which an occupant rides and a vehicle body rear portion provided with a rear suspension, and the vehicle body front portion, the vehicle body center portion, and the vehicle body rear portion are removably connected to form the vehicle body. The power unit is disposed in the center at a position opposite to the driver's seat.

According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a steering performance test vehicle according to the thirteenth aspect, wherein a balance weight installation part for installing a balance weight is provided at each of the front part and the rear part of the vehicle body. Set the weight approximately equal to the target vehicle weight minus the weight of the power unit and other equipment and the weight of the balance weight required to maximize the change in the center of gravity from the state before mounting the balance weight. It is. A method for manufacturing a steering performance test vehicle according to a fifteenth aspect is the method according to the thirteenth aspect, wherein the roof at the center of the vehicle body is detachably mounted, and one selected from a plurality of roofs having different rigidities is used as the roof. It is.

According to a sixteenth aspect of the present invention, there is provided a method of manufacturing a steering performance test vehicle according to the thirteenth aspect, wherein a mounting structure of a door to be mounted between front and rear supports on a side surface of a center portion of a front vehicle body is changed. It changes the rigidity. According to a seventeenth aspect of the present invention, there is provided a method of manufacturing a steering performance test vehicle according to the fifteenth aspect, wherein the transfer device of the power unit is disposed at a vehicle width center side. A method for manufacturing a steering performance test vehicle according to claim 18, wherein in the method according to claim 16, a power unit arranging portion for arranging a power unit is also provided at the rear portion of the vehicle body, and the power unit arranged at the center portion of the vehicle body is provided with a power unit arranging at the rear portion of the vehicle body. The propeller shaft, which has been extended rearward from the transfer device when the power unit has been moved, is utilized as a propeller shaft extending forward from the transfer device of the power unit after the transfer.

[0010]

According to the first aspect of the present invention, a power unit is provided at the center of the vehicle body, which is formed by connecting the front part of the vehicle body, the center part of the vehicle body, and the rear part of the vehicle body to be disassembled. Since it is located on the side opposite to the driver's seat, it is easy to set the center of gravity at the center of the test vehicle, and the moment of inertia around the center of gravity is also small, so it is extremely easy to adjust the weight balance with the balance weight. And the weight of the balance weight can be reduced. Since the vehicle body has a structure in which a vehicle body front portion, a vehicle body central portion, and a vehicle body rear portion are removably connected, the structure of the vehicle body central portion is made of a material different from the vehicle body front portion and the vehicle body rear portion (for example, Described materials), and it is possible to freely set the mechanical performance of the central portion of the vehicle body without affecting the front portion and the rear portion of the vehicle body.

According to a second aspect of the present invention, the vehicle body front part and the vehicle body rear part are formed into a skeleton monocoque structure including a frame structure and a skin panel detachably connected to the frame structure. By removing the skin panel at the rear of the vehicle body, it is advantageous for attaching and detaching and adjusting front and rear suspension devices. Further, the aerodynamic characteristics can be changed by replacing the skin panel. According to the third aspect, the central portion of the vehicle body has a monocoque structure composed of a panel in which an aluminum honeycomb material is sandwiched between two reinforced fiber reinforced synthetic resin panels, so that its rigidity and strength are sufficiently secured with a lightweight structure. it can.

According to the fourth aspect, since the power unit is installed vertically, the driving force transmission system to the front wheels and the rear wheels is simplified. According to the fifth aspect, the fuel tank is disposed on the opposite side of the power unit from the rear portion of the center portion of the vehicle body, which is advantageous in achieving weight balance in the vehicle width direction. In claim 6,
A front cross member having a plurality of mounting portions capable of mounting a plurality of types of suspension mechanisms is provided at a front portion of the vehicle body, and a rear cross member having a plurality of mounting portions capable of mounting a plurality of types of suspension mechanisms is provided at a rear portion of the vehicle body. With the provision, the test can be performed by selectively attaching various suspension mechanisms without replacing the front cross member and the rear cross member.

According to claim 7, the front cross member is
A predetermined first posture, and 180 degrees in a horizontal plane from the first posture.
Since the configuration is such that the front wheel can be attached to the first posture and the second posture, the center position of the front wheel can be made different between the first posture and the second posture. As a result, the wheel base can be easily changed. Become like According to the eighth aspect, since the balance weight installation portion for mounting a plurality of balance weights is provided at the front portion of the vehicle body, the balance weight simplifies weight balance and weight position adjustment. According to the ninth aspect, the balance weight installation portion for attaching a plurality of balance weights is provided at the rear part of the front vehicle body, so that the balance weight simplifies weight balance and weight position adjustment.

According to a tenth aspect of the present invention, a booster and a master cylinder for a front wheel of a brake device and a booster and a master cylinder for a rear wheel which are independent of the booster and a master cylinder are provided. By placing it in the center,
The operating force transmission system from the brake pedal to the front and rear wheel boosters and the master cylinder can be simplified. According to the eleventh aspect, the front wheel booster and the rear wheel booster are connected by a balance lever, and the rear wheel brake pressure supply system is provided with a cut valve switchable in a plurality of stages. Can be switched to a plurality of stages. According to the twelfth aspect, at least a portion of the front wheel brake hose of the brake device is disposed on the front cross member, and at least a portion of the rear wheel brake hose is disposed on the rear cross member. become.

According to a thirteenth aspect of the present invention, there is provided a method of manufacturing a steering performance test vehicle, wherein a front portion of a vehicle body provided with a front suspension, a central portion of a vehicle body on which an occupant rides, and a rear portion of a vehicle body provided with a rear suspension are divided. The vehicle body is constructed by connecting the front part of the vehicle body, the central part of the vehicle body and the rear part of the vehicle body in a disassemblable manner. Accordingly, the same operation and effect as those of the first aspect can be obtained.

According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a steering performance test vehicle, wherein a balance weight installation part for installing a balance weight is provided at each of the front part and the rear part of the vehicle body. , The weight of the power unit and other equipment, and the weight of the balance weight required to maximize the change in the center of gravity from the state before the balance weight is installed, are set to be substantially equal to the weight, so that the body weight is reduced as much as possible. Thus, the moment of inertia around the weight is set small, and the adjustment of the weight balance (including the adjustment of the position of the center of gravity) and the adjustment of the moment of inertia can be performed via the balance weight that is as light as possible.

According to the fifteenth aspect, since the roof at the center of the vehicle body is detachably mounted and one of a plurality of roofs having different rigidities is used as the roof, the rigidity of the vehicle body can be easily adjusted via the roof. be able to. According to the sixteenth aspect, the rigidity of the vehicle body can be changed by changing the mounting structure of the door mounted between the front and rear pillars on the side surface portion of the front vehicle body central portion. In the seventeenth aspect, arranging the transfer device of the power unit on the center side of the vehicle width is advantageous in connecting the drive shaft to the front and rear differential devices. The propeller shaft according to claim 18, further comprising a power unit arranging portion for arranging the power unit also in the rear portion of the vehicle body, and extending rearward from the transfer device when the power unit arranged in the central portion of the vehicle body is moved to the power unit arranging portion in the rear portion of the vehicle body. Can be used as a propeller shaft extending forward from the transfer device of the power unit after the transfer.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. The steering performance test vehicle according to the present embodiment is a test vehicle for performing various tests with various parameters related to steering stability, aerodynamic characteristics, and the like. And a method of manufacturing the same. As shown in FIGS. 1 to 3, the vehicle body 2 of the steering performance test vehicle 1 includes a vehicle body front portion 3, a vehicle body central portion 4, and a vehicle body rear portion 5.
, Which are divided into three parts, are connected so as to be disassembled and integrated.

The structure of the vehicle body center portion 4 will be described. In order to increase the rigidity of the car body center part 4 and make it as lightweight as possible, the car body center part 4 has a monocoque structure made of a panel made of sandwiched aluminum honeycomb material between two carbon fiber reinforced synthetic resin panels. It is configured. A partition wall 6 is formed at the front end of the vehicle body central portion 4, and a partition wall 7 is formed at the rear end portion. The central portion of the partition wall 7 is formed in a trapezoidal shape protruding toward the cabin 8. . Further, in order to increase the rigidity and strength of the vehicle body central portion 4, a center strut 9 is provided on the vehicle body center line at the center in the vehicle width direction, extending over the substantially upper end portion of the partition wall 6 and the middle portion of the partition wall 7.

The roof of the vehicle body center portion 4 has a separate structure, and one roof member 10 selected from a plurality of roof members 10 having different stiffness is detachably fitted. In this fitting structure, a total of six V-shaped concave portions are formed on the outer peripheral portion of the roof member 10, and a total of six V-shaped concave portions on the inner peripheral surface of the roof opening 11 are opposed to the front portion. A total of six V-shaped recesses are formed.
Loads can be transmitted by interposing and fastening steel balls to the V-shaped recesses of the set. Thus, the rigidity of the vehicle body 2 can be changed by selectively changing the rigidity of the roof member 10.

A front window glass 12 is mounted on a front portion of the vehicle body center portion 4, and left and right door openings 13 are provided.
The door 14 is detachably fitted without detaching a hinge, the left and right doors 14 are also used as members contributing to the rigidity of the vehicle body, and the left and right doors 14 are also mounted so as to transmit a load. ing. Regarding the left and right doors 14,
By changing the mounting structure of the vehicle body center portion 4 to the door opening 13, the load transmission performance can be changed and the vehicle body rigidity can be changed. As shown in FIG. 1, the rear end of the vehicle body center portion 4 has a total of one
Zero connecting parts 15 are provided, and these connecting parts 15 are removably connected via bolts and nuts to corresponding connecting parts provided on the frame structure of the rear part 5 of the vehicle body. Similarly, at the front end of the vehicle body center portion 4, a total of six connecting portions 16 for connecting to the vehicle body front portion 3 are provided, and these connecting portions 16 are provided in the frame structure of the vehicle body front portion 3. The connecting portions are removably connected via bolts and nuts.

A driver's seat device 18 is disposed on the right side of the floor panel 17 of the vehicle body center portion 4.
The power unit 20 is vertically arranged in the front-rear direction over the central portion and the left portion. The power unit 20 includes an engine 21, an automatic transmission 22, and a planetary gear mechanism 23a for distributing driving force to an output gear of the automatic transmission 22.
The transfer device 23 is arranged on a center line in the center of the vehicle width, and a front drive output shaft of the transfer device 23 is connected to a front differential device 24, A rear drive output shaft of the transfer device 23 is connected to a rear differential device 26 via a drive shaft 25.

With respect to the power unit 20, it is possible to adopt three driving modes of four-wheel drive, front-wheel two-wheel drive, and rear-wheel two-wheel drive through connection / non-connection of the transfer device 23 and the differential devices 24 and 26. In addition, by switching the planetary gear mechanism 23a for distributing the driving force, the driving force distribution ratio between the front wheels and the rear wheels in the case of the four-wheel drive can be largely changed. In addition, a balance weight installation part 27 for arranging a balance weight as needed is provided on the left rear part on the floor 17 of the vehicle body central part 4.
Is also provided. Further, a fuel tank 28 is disposed below the seat device 18 on the right side, and a battery 29 is disposed on the left side below the rear end portion of the floor panel 17.

Further, a steering handle 30 and a steering column 31 extending from the steering handle 30 are provided in the central portion 4 of the vehicle body.
Booster 34 and master cylinder 3 for front wheel brake device
5. A booster 36 and a master cylinder 37 for the rear wheel brake device, a brake pedal 39, a cut valve 40 provided in a brake pressure supply system of the rear wheel brake device and capable of switching to a plurality of stages, an instrument not shown. Ment panels and the like are provided. The front wheel booster 34 and the rear wheel booster 36 are connected by a balance lever 38, and a lower end of a brake pedal 39 is connected to a middle part of the balance lever 38 in the left-right direction. The lower end is variably connected to an intermediate portion of the balance lever 38 via a squeeze mechanism.

In order to reduce the weight, the front vehicle body front part 3 and the vehicle body rear part 5 are provided with a three-dimensional frame structure 50, 52 made of a steel pipe material or a steel mold member, and a synthetic resin or a synthetic resin connected to the three-dimensional frame structure. The skeleton monocoque structure is composed of metal skin panels 51 and 53 (see FIGS. 4 and 5). In order to change the aerodynamic characteristics of the steering performance test vehicle 1, the skin panels 51 and 53 of the vehicle body front part 3 and the vehicle body rear part 5 are as follows.
A plurality of types of skin panels having different aerodynamic characteristics are manufactured, and one selected one of the skin panels 51 and 53 is mounted. And, the vehicle body front part 3, the vehicle body center part 4,
After separately assembling the vehicle body rear part 5 with each other, they are connected by bolts and nuts. In this connection,
A part of the skin panel 51 on the side surface of the vehicle body front part 3 overlaps a predetermined length outside the side surface of the vehicle body central part 4, and a part of the skin panel 53 on the side surface of the vehicle body rear part 5 is A predetermined length overlaps the outside of the side surface.

A pair of left and right front wheels 54 are provided on the front part 3 of the vehicle body.
A cuboid frame-shaped cross member 55 having a frame structure is disposed between the front wheels 54, and is connected to and supported by the frame structure 50 of the vehicle body front part 3. The front wheel differential 2
4 and a pair of left and right drive shafts 56 extending left and right from the front wheel differential 24
Axle spindles. At the rear end of the cross member 55, a steering unit 32 including a rack and pinion mechanism of a power steering device and a power cylinder is disposed.
2 is connected to the left and right front wheels 54 via tie rods 33, respectively.

At the left and right ends of the cross member 55,
A plurality of connecting portions for connecting suspension link members, arm members, straddes, etc. of a plurality of types of suspension devices are provided, respectively, and are provided by link members, arm members, struts, etc. of one type of suspension device selected for testing. The left and right front wheels 54 are connected to the cross member 55. As shown in the drawing, the cross member 55 has a first posture in which the axial center position of the front wheel 54 is set to a point P1 and, by inverting the first posture by 180 degrees in a horizontal plane, the center of the left and right front wheels 54 is obtained. The position can be switched to a second posture in which the position is moved to the point P2 by a predetermined distance behind the point P1. Thus, the wheel base can be easily changed by changing the posture of the cross member 55.

A horizontal stepped shelf board 57 is provided at the middle height position of the front portion 3 of the vehicle body and above the cross member 55, and a front portion on the shelf board 57 has a balance. Balance weight setting part 5 for setting weight 58
9 is provided, and a balance weight installation portion 60 located above the cross member 55 is provided at a rear portion on the shelf board 57.
Is provided. As shown in FIG. 4, a brake hose 41 of a brake pressure supply system of the brake device for the front wheels 54 is provided.
Are arranged in the left-right direction along the rear end of the cross member 55, and the brake hoses 41 are connected to the brake cylinders 45 of the left and right front wheels 54, respectively.

A pair of left and right rear wheels 61 are provided at the rear portion 5 of the vehicle body.
A cuboid frame-shaped cross member 62 having a frame structure is provided between the rear wheels 61, and is connected to and supported by the frame structure 52 of the rear portion 5 of the vehicle body. The rear wheel differential 2
And a pair of left and right drive shafts 63 extending left and right from the rear wheel differential device 26.
Axle spindles. A floor panel 64 is provided on a lower end surface of the rear portion 5 of the vehicle body.

At the left and right ends of the cross member 62,
A plurality of connecting portions for connecting suspension link members, arm members, straddes, and the like of a plurality of types of suspension devices are provided, respectively, and are provided by link members, arm members, struts, and the like of one type of suspension device selected for testing. The left and right rear wheels 61 are connected to the cross member 62. As shown in the drawing, the cross member 62 has a first position in which the axis position of the rear wheel 61 is set to a point P3, and the first member is moved rearward in the horizontal plane by a predetermined distance to set the axis position at the point P3. It is configured to be switchable to the second posture of P4. The cross member 62 is also connected to a floor panel 64 as needed. In this way, by switching the position of the cross member 62, the wheelbase can be easily changed.

At the front center of the floor 64 of the rear part 5 of the vehicle, a power unit 20
A power unit installation section 65 for moving the power unit 20 rearward by a predetermined distance and relocating the same is provided. When the power unit 20 is relocated to the power unit installation section 65, the drive shaft 25 is moved from the transfer device 23 to the front differential device 24. A power unit installation section 65 is provided at a position that can be used as a drive shaft for transmitting the driving force. Thus, even when the power unit 20 is relocated, the drive shaft 25 can be effectively used. Further, a balance weight installation section 67 for installing a balance weight 66 is provided at a front portion on the floor 64, and a box-shaped balance with a top cover openable / closable is provided on the cross member 62 and on the upper rear side thereof. A weight installation box 68 is provided, and inside thereof, balance weight installation sections 69 and 71 for installing the balance weights 70 and 72 are provided.

The brake hose of the brake pressure supply system of the rear wheel brake device includes a brake hose 42 extending from the master cylinder 37 to the cut valve 40 and a brake hose 4 extending from the cut valve 40 to the cross member 62.
3 and a brake hose 44 disposed along the rear end of the cross member 62 and connected to the brake cylinders 46 for the left and right rear wheels 61, respectively.

The body weight of the body 2 of the steering performance test vehicle 1 is necessary for maximizing the change of the center of gravity from the target vehicle weight, the weight of the power unit 20 and other accessories, and the state before mounting the balance weight. Is set substantially equal to a value obtained by subtracting the weight of the balance weight. in this way,
By setting the body weight, the body weight can be set as small as possible, and the moment of inertia of the body 2 can be set as small as possible.

The operation of the steering performance test vehicle 1 described above will be described. The vehicle body 2 is divided into a vehicle body front portion 3 and a vehicle body central portion 4.
And a rear part 5 of the vehicle body, and are configured to be connected so that they can be disassembled.
Since the zero is arranged, the center of gravity is easily located at the center part 4 of the vehicle body, and adjustment of the weight balance, adjustment of the position of the center of gravity, and adjustment of the moment of inertia are facilitated. In addition, the adjustment can be easily performed via a plurality of relatively lightweight balance weights.

The vehicle body 2 of the test vehicle 1 is divided into a vehicle front part 3, a vehicle body center part 4, and a vehicle body rear part 5, so that the vehicle body 2 of the vehicle performance test vehicle 1 has a central part. The center of gravity can be easily set, and the moment of inertia around the center of gravity is also reduced, so that adjustment of the weight balance by the balance weight becomes extremely easy, and the weight of the balance weight can be reduced. . Since the vehicle body 2 has a structure in which the vehicle body front portion 3, the vehicle body central portion 4, and the vehicle body rear portion 5 are disassembled and connected, the structure of the vehicle body central portion 4 is made of a material different from the vehicle body front portion 3 and the vehicle body rear portion 5. -It becomes possible to comprise with a structure, and it becomes possible to set the mechanical performance of the vehicle body center part 4 freely, without affecting the vehicle body front part 3 and the vehicle body rear part 5.

Here, since the vehicle body front part 3 and the vehicle body rear part 5 are formed into a skeleton monocoque structure comprising frame structures 50 and 52 and skin panels 51 and 53 which are removably connected thereto, respectively, the weight is light. By removing the skin panels 51, 53 of the front part 3 and the rear part 5 of the vehicle body, it is advantageous for attaching and detaching and adjusting the front and rear suspension devices, etc., and replacing the skin panels 51, 53. Can change the aerodynamic characteristics. Car body center part 4
Is constructed in a monocoque structure comprising a panel in which an aluminum honeycomb material is sandwiched between two carbon fiber reinforced synthetic resin panels, so that its rigidity and strength can be sufficiently secured with a lightweight structure.

Further, since the power unit 20 is installed vertically in the front-rear direction, the driving force transmission system is simplified, and the fuel tank 28 is disposed on the rear portion of the vehicle body center portion 4 on the side opposite to the power unit 20. This is advantageous in maintaining a weight balance in the vehicle width direction. Further, a front cross member 55 having a plurality of mounting portions capable of mounting a plurality of types of suspension mechanisms is provided on the front portion 3 of the vehicle body, and a plurality of mounting portions capable of mounting a plurality of types of suspension mechanisms is provided on the rear portion 5 of the vehicle body. Since the rear cross member 62 is provided, the test can be performed by selectively attaching various suspension mechanisms without replacing the front cross member 55 and the rear cross member 62.

Further, the front cross member 55 is
A first posture shown in FIG.
Since the configuration is such that the front wheel 54 can be selectively mounted to the second posture turned to 0 degrees, the axial position of the front wheel 54 can be made different between the first posture and the second posture. As a result, the wheel base can be simplified. Can be changed to In the vehicle body front part 3,
Since the balance weight installation parts 59 and 60 for mounting a plurality of balance weights are provided, the balance weight simplifies weight balance and weight position adjustment, and the balance for mounting the plurality of balance weights to the rear part 5 of the vehicle body. Since the weight installation portions 67, 69, and 71 are provided, the balance weight simplifies weight balance and weight position adjustment.

FIGS. 6 to 8 show a conventional general automobile and a steering performance test of the present invention with respect to the variable width of the front load ratio, the variable width of the wheelbase and the weight, and the variable width of the wheelbase and tread. It is illustrated by comparing with the car 1. In the steering performance test vehicle 1 of the present invention, the plurality of balance weight installation portions 59, 60, 27, 67, 69, 7
By appropriately setting the balance weight on the front wheel 1, the load ratio of the front wheel 54 can be largely changed (FIG. 6).
reference). Further, the variable width of the wheel base and the weight can be largely changed within a practical range through the switching of the position of the front cross member 55 and the switching of the position of the rear cross member 62 (see FIG. 7). Furthermore,
By changing the length of various suspension links and arms, the tread can be greatly changed, and the wheelbase can also be significantly changed as described above. Can be greatly changed in a typical range (FIG. 8
reference).

Here, as the structure of the vehicle body center portion 4, a steel structure can be adopted, and the structures of the front and rear cross members 55 and 62 are various structures. It is needless to say that the present invention is not limited to the above-described embodiment, as a matter of course, in some cases, the present invention may be implemented by appropriately changing a part of the configuration.

[Brief description of the drawings]

FIG. 1 is a side view of a steering performance test vehicle according to an embodiment before connection.

FIG. 2 is a side view of the steering performance test vehicle of FIG. 1 in a connected state.

FIG. 3 is a plan view of the steering performance test vehicle of FIG. 1 in a connected state.

FIG. 4 is a plan view of a main part showing a frame structure of a front part of a vehicle body of the steering performance test vehicle of FIG. 1;

FIG. 5 is a plan view of a main part showing a frame structure of a rear part of the vehicle body of the steering performance test vehicle of FIG. 1;

FIG. 6 is an explanatory diagram for explaining a variable width of a front load ratio between a conventional vehicle and a steering performance test vehicle of the present invention.

FIG. 7 is an explanatory diagram for explaining a variable width of a wheel base and a total weight of a conventional vehicle and a steering performance test vehicle of the present invention.

FIG. 8 is an explanatory diagram for explaining a variable width of a wheelbase tread of a conventional vehicle and a steering performance test vehicle of the present invention.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 steering performance test vehicle 2 body 3 body front 4 body center 5 body rear 20 power unit 23 transfer device 28 fuel tank 34 booster 35 master cylinder 36 booster 37 master cylinder 38 balance lever 39 brake pedal 50, 52 Frame structure 51, 53 Skin panel 55 Front cross member 59, 60, 67, 69, 71 Balance weight installation part 62 Rear cross member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 63/00 B62D 39/00

Claims (18)

(57) [Claims] 1. A steering performance test vehicle for testing steering stability, wherein a front portion of a vehicle body provided with a front suspension, a central portion of a vehicle body on which an occupant rides, and a rear portion of a vehicle body provided with a rear suspension can be disassembled. A steering performance test vehicle, characterized in that a vehicle body connected to the vehicle is provided, and a power unit is arranged in a central portion of the vehicle body on a side opposite to a driver's seat. 2. The vehicle according to claim 1, wherein at least the vehicle body front part and the vehicle body rear part are each configured as a skeleton monocoque structure including a frame structure and a skin panel detachably connected to the frame structure. The driving performance test vehicle described. 3. The steering performance according to claim 1, wherein the central portion of the vehicle body has a monocoque structure comprising a panel in which an aluminum honeycomb material is sandwiched between two reinforcing fiber reinforced synthetic resin panels. Test car. 4. The test vehicle according to claim 1, wherein the power units are arranged vertically in a longitudinal direction of the vehicle. 5. The steering performance test vehicle according to claim 1, wherein a fuel tank is disposed in a rear portion of the central portion of the vehicle body opposite to a power unit. 6. A front cross member provided with a plurality of mounting portions to which a plurality of types of suspension mechanisms can be mounted at a front portion of the vehicle body, and a plurality of mounting portions to which a plurality of types of suspension mechanisms can be mounted at a rear portion of the vehicle body. The steering performance test vehicle according to claim 1, further comprising a rear cross member provided. 7. The apparatus according to claim 1, wherein the front cross member can be selectively attached to a predetermined first posture and a second posture which is turned 180 degrees in a horizontal plane from the first posture. The driving performance test vehicle according to claim 6. 8. The steering performance test vehicle according to claim 1, wherein a balance weight installation part for mounting a plurality of balance weights is provided at the front part of the vehicle body. 9. The steering performance test vehicle according to claim 1, wherein a balance weight installation portion for attaching a plurality of balance weights is provided at a rear portion of the front vehicle body. 10. A front wheel booster and a master cylinder for a brake device, and a rear wheel booster and a master cylinder independent of the brake booster and a master cylinder are provided. The steering performance test vehicle according to claim 1, wherein the vehicle is arranged. 11. A front wheel booster and a rear wheel booster are connected by a balance lever, and a rear valve brake pressure supply system is provided with a cut valve which can be switched in a plurality of stages,
The steering performance test vehicle according to claim 10, wherein the cut valve is disposed at a center portion of the vehicle body. 12. The brake device according to claim 1, wherein at least a part of a front wheel brake hose of the brake device is disposed on a front cross member, and at least a part of a rear wheel brake hose is disposed on a rear cross member. Item 7. A driving performance test vehicle according to Item 6. 13. A vehicle body front part provided with a front suspension, a vehicle body center part on which an occupant rides, and a vehicle body rear part provided with a rear suspension are separately manufactured, and the vehicle body front part, the vehicle body central part and the vehicle body rear part are manufactured. And a power unit is disposed in a central portion of the vehicle body at a position opposite to a driver's seat and is disposed. 14. A balance weight installation part for installing a balance weight at each of a front part and a rear part of the vehicle body, wherein the vehicle body weight of the vehicle body is calculated based on a target vehicle weight and a weight of a power unit and other accessories. 14. The method according to claim 13, wherein a value obtained by subtracting a weight of a balance weight necessary for maximizing a change in the center of gravity from a state before mounting the weight is set substantially equal to a value obtained by subtracting the weight. 15. The steering performance test vehicle according to claim 13, wherein the roof at the center portion of the vehicle body is detachably attached, and one selected from a plurality of roofs having different rigidities is used as the roof. Production method. 16. The steering performance test vehicle according to claim 13, wherein the rigidity of the vehicle body is changed by changing a mounting structure of a door mounted between front and rear struts of a side surface portion in a center portion of the front vehicle body. Manufacturing method. 17. The power unit according to claim 15, wherein a transfer device of the power unit is disposed at a center side of a vehicle width.
3. The method for manufacturing a steering performance test vehicle according to 1. 18. A propeller that extends rearward from a transfer device when a power unit arrangement portion for disposing a power unit is also provided at the rear portion of the vehicle body and the power unit arranged at the center portion of the vehicle body is moved to the power unit arrangement portion at the rear portion of the vehicle body. The method according to claim 16, wherein the shaft is used as a propeller shaft extending forward from a transfer device of the power unit after the transfer.